@banner-max-size: 150;

.container {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.banner {
  position: absolute;
  top: 50%;
  left: 50%;
  width: @banner-max-size + 0vw;
  height: @banner-max-size + 0vh;
  z-index: 0;
  background: #eee center/cover no-repeat;
  animation: banner 300s ease-in-out infinite;
}

.form_container {
  position: relative;
  z-index: 2;
  height: 100vh;
  width: 500px;
  max-width: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.content {
  margin: 0 @spacing;
  padding: 2 * @spacing;
  background-color: #fff;
  box-shadow: 0 2px 8px 0 #333;
  border-radius: 10px;
}

.title {
  margin: @spacing 0;
  font-size: 300%;
  font-weight: bold;
  text-align: center;
  text-transform: uppercase;
}

.logo_color {
  display: block;
  width: 80px;
  margin: @spacing auto;
}

.submit_btn {
  margin-top: @spacing;
}

.sign_up_row {
  text-align: center;

  a {
    display: inline-block;
    margin-left: 0.5 * @spacing;
  }
}

@keyframes banner {
  0%,
  100% {
    transform: translate(-50%, -50%) scale(100 / @banner-max-size);
  }
  50% {
    transform: translate(-50%, -50%) scale(1);
  }
}
